Lecture 14 Vitamin E - MC

Question 1

What is the structural difference between alpha-tocotrienol and alpha-tocopherol?
A) Alpha-tocotrienol has CH3 groups in positions 5 & 7.
B) Alpha-tocopherol has CH3 groups in positions 5 & 7.
C) Alpha-tocotrienol has H5 groups in positions 5 & 7.
D) Alpha-tocopherol has H5 groups in positions 5 & 7.

Answer 1

B

Question 2

Which part of the tocopherol structure serves as the head?
A) Chromanol ring
B) Tail
C) Ester group
D) Phosphate group

Answer 2

A

Question 3

Which of the following best describes the main functions of tocopherols?
A) Promote the synthesis of collagen in skin cells.
B) Act as free radical quenchers and antioxidants in cell membranes.
C) Increase the absorption of calcium and phosphorus from the intestine.
D) Regulate blood sugar levels by enhancing insulin action.

Answer 3

B

Question 4

Tocopherols help minimize the damage due to which of the following?
A) High blood glucose levels
B) DNA replication errors
C) Lipid peroxidation
D) Protein denaturation

Answer 4

C

Question 5

*Which condition is NOT directly linked to the antioxidative function of tocopherols?
A) Atherosclerosis
B) Ethanol-induced liver injury
C) Oxygen toxicity
D) Bone density reduction

Answer 5

B